文档介绍：，GA是代表厚度的意思。。北美标准GA是北 美的一种关于直径的长度计量单位！属于Browne&Sharpe计量系统，最初是用在 医学和珠宝领域的！数字越大直径越小。后来推广了，也可以表示厚度。.有色 金属板4" 2. 9 mm
0. 118" 3. 0 mm
8/64” (1/8”) 0. 125" 3. 18 mm
8ga 0. 12849" 3. 26 mm
9/64" 0. 141" 3. 57 mm
7ga 0. 144" 3. 66 mm 10/64" (5/32") " 3. 97 mm 0. 157" mm
6ga 0. 162" 4. 1 mm 11/64" " 4. 37 mm 5ga 0. 182" 4. 6 mm 12/64" (3/16") " 4. 76 mm 0. 197" 5. 0 mm 13/64" " 5. 16 mm 4ga 0. 204" 5. 2 mm 14/64" (7/32") " 5. 56 mm 3ga 0. 229" 5. 8 mm 15/64" 0. 234" 5. 95 mm 0. 236" 6. 0 mm 16/64" (1/D 0. 250" 6. 35 mm 2ga " 6. 54 mm 17/64" " 6. 747 mm 0. 276" 7. 0 mm 18/64" (9/32") 0. 281" 7. 14 mm lga 0. 289" 7. 3 mm 19/64" " 7. 54 mm 20/64" (5/16") " 7. 94 mm 0. 315" 8. 0 mm
Oga " 8. 2525 mm 21/64" " 8. 33 mm 22/64" (11/320 " 8. 73 mm 0. 354" 9. 0 mm 23/64" " 9. 13 mm OOga " mm 24/64" (3/8”) " 9. 53 mm 25/64" " 9. 92 mm 0. 394" 10. 0 mm 26/64" (13/32") " mm OOOga 0. 4096" 10. 4 mm 27/64" " mm " 11. 0 mm 28/64" (7/16") " 11. 11 mm 29/64" " 11. 51 mm OOOOga " 11. 68 mm 30/64" (15/32") " mm 0. 472" 12. 0 mm 31/64" " mm 1/2" (32/64") " mm 0. 512" 13. 0 mm
OOOOOga " mm 0. 551" 14. 0 mm 9/16" (36/64") " 14.